Device and method for aerosol dispensing of a plurality of dry powders and nano-materials

Abstract

The present invention is a powder aerosol device that includes a cylindrical vessel, a nozzle that disperses by aerosol a plurality of dry powders and nano-materials contained in the cylindrical vessel and a propellant chamber that contains a propellant. The device also includes a cylinder that contains the plurality of dry powders and nano-materials dispersed by the aerosol to ambient, a piston held within the cylinder that moves the piston to push the plurality of dry powders and nano-materials toward the nozzle and a plurality of apertures disposed on the piston where propellant stream is passed through the plurality of apertures which fluidizes the plurality of dry powders and nano-materials. The present invention also includes a method for aerosol dispensing of a plurality of dry powders and nano-materials with a powder aerosol device.

1 . A powder aerosol device, comprises:
 a cylindrical vessel with a top portion with a middle;   a nozzle that includes a nozzle valve, said nozzle is disposed on said top portion in said middle of said cylindrical vessel;   a propellant chamber that contains a propellant;   a cylinder that contains a plurality of dry powders and nano-materials dispersed by said aerosol to ambient;   a piston held within said cylinder, said piston moves to push said plurality of dry powders and nano-materials to produce more effective gas and powder entrainment effects; and   a plurality of apertures disposed on said piston, said plurality of apertures disperses by aerosol said plurality of dry powders and nano-materials contained in said cylindrical vessel, said plurality of apertures fluidizes said plurality of dry powders and nano-materials.   
     
     
         2 . The powder aerosol device according to  claim 1 , wherein said propellant is a compressed gas. 
     
     
         3 . The powder aerosol device according to  claim 2 , wherein said compressed gas is nitrogen. 
     
     
         4 . The powder aerosol device according to  claim 2 , wherein said compressed gas is argon. 
     
     
         5 . The powder aerosol device according to  claim 2 , wherein said compressed gas is carbon dioxide. 
     
     
         6 . The powder aerosol device according to  claim 1 , wherein said propellant is a phase change material. 
     
     
         7 . The powder aerosol device according to  claim 6 , wherein said phase change material is hydrofluoroalkane-134a. 
     
     
         8 . The powder aerosol device according to  claim 6 , wherein said phase change material is 2,3,3,3-Tetrafluoropropene. 
     
     
         9 . The powder aerosol device according to  claim 1 , wherein said propellant is a refrigerant. 
     
     
         10 . The powder aerosol device according to  claim 1 , wherein said plurality of apertures provides a gas stream of aerosol gas flow through said plurality of dry powders and nano-materials and out said nozzle. 
     
     
         11 . A powder aerosol device, comprises:
 a cylindrical vessel with a top portion with a middle;   a nozzle that includes a nozzle valve, said nozzle is disposed on said top portion in said middle of said cylindrical vessel;   a propellant chamber that contains a propellant, said propellant includes a compressed gas and a phase change material;   a cylinder that contains said plurality of dry powders and nano-materials dispersed by said aerosol to ambient;   a piston held within said cylinder, said piston moves to push said plurality of dry powders and nano-materials to produce more effective gas and powder entrainment effects; and   a plurality of apertures disposed on said piston, said plurality of apertures disperses by aerosol said plurality of dry powders and nano-materials contained in said cylindrical vessel, said plurality of apertures fluidizes said plurality of dry powders and nano-materials.   
     
     
         12 . The powder aerosol device according to  claim 11 , wherein said compressed gas is selected from the group consisting of nitrogen, argon or carbon dioxide. 
     
     
         13 . The powder aerosol device according to  claim 11 , wherein said phase change material is selected from the group consisting of hydrofluoroalkane-134 a,  2,3,3,3-Tetrafluoropropene, hydrofluoroalkane-134a or a refrigerant. 
     
     
         14 . The powder aerosol device according to  claim 11 , wherein said plurality of apertures provides a gas stream of aerosol gas flow through said plurality of dry powders and nano-materials and out said nozzle. 
     
     
         15 . The powder aerosol device according to  claim 11 , wherein said powder aerosol device disperses all of said plurality of dry powders and nano-materials. 
     
     
         16 . The powder aerosol device according to  claim 11 , wherein said powder aerosol device is set in motion by a pressure drop created when said nozzle is opened to said ambient. 
     
     
         17 . The powder aerosol device according to  claim 11 , wherein said powder aerosol device is stopped when said nozzle is closed to said ambient. 
     
     
         18 . A method for aerosol dispensing of a plurality of dry powders and nano-materials with a powder aerosol device, comprising the steps of:
 converting a granular material from a static solid-like state to a dynamic fluid-like state;   presenting a powder material to an nozzle of said powder aerosol device that releases a propellant and said powder material to ambient; and   using a single gas stream to move said powder material and said piston, said piston fluidize said powder material and provide an entrainment gas stream propelling said powder material to said ambient.   
     
     
         19 . The method according to  claim 18 , wherein said powder material is a plurality of dry powders and nano-materials and said propellant is a compressed gas, a phase change material or a refrigerant. 
     
     
         20 . The method according to  claim 18 , wherein said using step includes said entrainment gas stream propelling said powder material through said nozzle provided on said powder aerosol device to said ambient.